Dog Sudoku Level 77 Hint
Find a bone with only two or three available neighboring cells, then test those cells against the row count, column count, and no-touch rule.
Dog Sudoku Level 77 Strategy
Medium Level 77 uses a 7x7 board with 7 bones. Use the row and column dog counts first, then resolve bones with limited neighboring cells.
Dog Sudoku Level 77 Solution
Solution dog cells: R2C5, R3C1, R4C7, R5C1, R5C3, R7C4, R7C7.